it is thanks to aggressive law enforcement strategies following september 11th. in fact, according to the global terrorism database, my favorite database, the post 9 lsh slen decade saw fewer attacks than in 2001. and as former mayor rudy guiliani noted on tuesday that is surprising. >> really the big news here is this is a horrible you a tack and a terrible attack. my heart goes out to those hurt and it is surprising there haven't been more of these since september 11th. we expected many attacks like this. the really remarkable story is so many have been prevented. >> that's true. i ran into the mayor getting a cup of coffee. he said absolutely which means no. >> by having that cliff could we say he is on the show? rudy guiliani is a "red eye" guest. i said we don't tape at 3:00 a.m. he says it seems like it does. i said that's because we are drunk. >> these numbers, do they surprise you? >> and does it matter? it matters that it is getting lower, but there is no way but to feel bizarre and awful after each one. >> right. i was thinking about the numbers and it